package com.sky.service.impl;

import com.github.pagehelper.Constant;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = (Page<DishVO>) dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        //属性拷贝
        BeanUtils.copyProperties(dishDTO, dish);
        //新增一条菜品
        dishMapper.insert(dish);

        //批量新增口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(flavor->flavor.setDishId(dish.getId()));
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否处于起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){//当前菜品处于起售中
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断当前菜品是否关联了套餐
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if (setmealIds != null && setmealIds.size() > 0 ){//当前菜品被套餐关联
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }

        //删除菜品表中的菜品数据
        dishMapper.deleteByIds(ids);
        //根据菜品集合批量删除关联的菜品口味
        dishFlavorMapper.deleteByDishIds(ids);

    }

    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品基础数据
        Dish dish = dishMapper.getById(id);
        //根据id查询菜品口味表中的数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);

        //将查询的数据封装到dishVO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    @Override
    public void updateWithFlavor(DishDTO dishDTO) {
        //将dishDTO部分字段拷贝到Dish对象，更为规范
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //修改原来菜品的字段
        dishMapper.update(dish);

        //批量删除菜品对应的口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //批量添加菜品对应的口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && flavors.size() >0 ){
            flavors.forEach(fl->fl.setDishId(dishDTO.getId()));
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        List<Dish> dishes = dishMapper.getByCategoryId(dish);
        return dishes;
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.getByCategoryId(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

    @Override
    public void startOrStop(Integer status, Long id) {
        if (status == StatusConstant.DISABLE){//status==0，表示停售菜品
            ArrayList<Long> list = new ArrayList<>();
            list.add(id);
            //根据菜品id查询所有套餐,会将关联的套餐一起停掉，复用之前接口
            List<Long> setmealIdsByDishIds = setmealDishMapper.getSetmealIdsByDishIds(list);
            Setmeal setmeal = new Setmeal();
            for (Long setmealId : setmealIdsByDishIds) {
                setmeal.setId(setmealId);
                setmeal.setStatus(status);
                setmealMapper.update(setmeal);
            }
        }
        //如果起售菜品，则修改当前菜品的状态即可
        Dish dish = Dish.builder().status(status).id(id).build();
        dishMapper.update(dish);
    }
}
